| Starbelly Limited | Wholesale & retail | 2024 |
| Stardust Laundry Ltd | Households | 2012 |
| Starknet Ltd | Professional & scientific | 2024 |
| Starlight Darians Community Interest Company | Education | 2025 |
| Starlight Property Holdings Limited | Real estate | 2023 |
| Starlight Taxis Limited | Transport & logistics | 2015 |
| Starrant Building Adaptations Limited | Construction | 2017 |
| Starrs Beauty Limited | Other services | 2019 |
| Stars Care Group Limited | Health & social care | 2025 |
| Stars Children's Care Limited | Health & social care | 2025 |
| Start Shining Limited | Wholesale & retail | 2019 |
| Starting Point Recruitment Limited | Administrative & support | 2002 |
| Station Barbers SSK1 Ltd | Other services | 2025 |
| Station Investment Holdings Ltd | Real estate | 2024 |
| Status Blue Consultancy Limited | Professional & scientific | 2026 |
| Stavert Enterprise Ltd | Wholesale & retail | 2026 |
| Staywarm Heating Soltions Ltd | Energy | 2020 |
| STB Lettings Limited | Real estate | 2017 |
| STB Network Ltd | Construction | 2025 |
| STC Management Services Limited | Professional & scientific | 2012 |
| Steady Skills and Training Centre Limited | Education | 2025 |
| Steady State Controls Ltd | Professional & scientific | 2010 |
| Steady Steps Living Limited | Real estate | 2025 |
| Steak Company Walsall Limited | Hospitality | 2024 |
| Stealth Security&Engineering Solutions Ltd | Information & communication | 2025 |
| Steel Street Investments Limited | Financial services | 2025 |
| Steeles Accountants Limited | Professional & scientific | 2025 |
| Steeltek Ltd | Manufacturing | 2013 |
| Stef & CEZ Ltd | Transport & logistics | 2014 |
| Stefan Top Logistics Ltd | Transport & logistics | 2025 |
| Steffi Sandhu Ltd | Other services | 2020 |
| Stellar Cleaning Solutions Ltd | Administrative & support | 2025 |
| Stellar Sounds and Events Ltd | Arts & recreation | 2023 |
| Stemirc Ltd | Transport & logistics | 2017 |
| Stemm Services Ltd | Construction | 2011 |
| Stemolight Limited | Real estate | 2024 |
| Stenson Holdings Ltd | Financial services | 2026 |
| Step Change Services Ltd | Professional & scientific | 2018 |
| Step-By-Step Consulting Ltd | Professional & scientific | 2013 |
| Stephen Anthony Pyne Hairdressing Ltd | Wholesale & retail | 2000 |
| Stepping Forward Limited | Education | 2012 |
| Steps 4 Life Care Ltd | Health & social care | 2013 |
| Stepwell (UK) Limited | Wholesale & retail | 1998 |
| Sterlin Ltd | Households | 2024 |
| Sterling Distribution Limited | Wholesale & retail | 2026 |
| Sterling Education Academy Limited | Education | 2019 |
| Sterling OIL and GAS Limited | Energy | 2020 |
| Sterling Property Compliance Ltd | Real estate | 2026 |
| Sterling Vale Ltd | Wholesale & retail | 2026 |
| Stetsonpubco Ltd | Hospitality | 2026 |
| Steve Bennett Engineering Services Limited | Professional & scientific | 2017 |
| Steve Bless Drive Ltd | Transport & logistics | 2020 |
| Steve Rounds & Associates Limited | Education | 2013 |
| Steve Woods Consultants Limited | Professional & scientific | 2016 |
| Steven Holt Services Ltd | Manufacturing | 2016 |
| Steven R. Barnes & SON Limited | Construction | 1991 |
| Stevie MC Saddles Limited | Manufacturing | 2009 |
| Stewarts MOT & Repair Centre Ltd | Wholesale & retail | 2009 |
| Stewarts Service and Maintenance Limited | Construction | 2024 |
| Stfp Investments Limited | Real estate | 2022 |
| Sthider Limited | Wholesale & retail | 2021 |
| Stickemuk Ltd | Wholesale & retail | 2025 |
| Stiris Ltd | Transport & logistics | 2025 |
| Stock Finders Limited | Wholesale & retail | 2022 |
| Stone Core Maintenance Limited | Construction | 2025 |
| Stone Creations Ltd | Construction | 2026 |
| Stone Cross Building Supply Limited | Wholesale & retail | 2026 |
| Stone Design Europe Limited | Professional & scientific | 2009 |
| Stonecross Building Merchant Ltd | Wholesale & retail | 2022 |
| Stonehouse Developments Ltd | Construction | 2016 |
| Stonnall Campaign About Roads | Other services | 2006 |
| Stonnall Fish Bar Ltd | Hospitality | 2026 |
| Stonnall Properties Limited | Construction | 2023 |
| Stonragow Ltd | Administrative & support | 2024 |
| Stop Prop and Roll Ltd | Arts & recreation | 2023 |
| Store My Car Ltd | Transport & logistics | 2020 |
| Storeriver Limited | Real estate | 1980 |
| Storm Interiors Limited | Construction | 2014 |
| Storm Windows (UK) Limited | Construction | 2003 |
| Stormguard Roofing & Maintenance Limited | Construction | 2024 |
| Stormguard Roofing (Town & Country) Limited | Construction | 2025 |
| Storspace Self Storage Limited | Transport & logistics | 2019 |
| Storyshare CIC | Arts & recreation | 2015 |
| Stowens Property Ltd | Real estate | 2025 |
| Straight and Narrow Drinks Limited | Manufacturing | 2020 |
| Strand Hardware Limited | Construction | 1990 |
| Strand Technologies Limited | Manufacturing | 2021 |
| Strathaven Designs Limited | Professional & scientific | 2025 |
| Stratify.Is Ltd | Information & communication | 2026 |
| Stratscend Consulting Ltd | Professional & scientific | 2025 |
| Stratx.Tech Ltd | Information & communication | 2026 |
| Street (UK) C.I.C. | Financial services | 1999 |
| Street (UK) Services Limited | Financial services | 2004 |
| Street Race Graphics Limited | Manufacturing | 2011 |
| Street Teams | Health & social care | 1999 |
| Street UK Homes Limited | Financial services | 2000 |
| Streetly Coaching Ltd | Education | 2025 |
| Streetly Scaffolding Ltd | Construction | 2026 |
| Strengthening Support Services Ltd | Health & social care | 2011 |
| Strictly Hair Limited | Other services | 2009 |